Deep brain stimulation begins by doctors drilling two small holes in the head of the patient.
VOA: special.2009.02.03
Small amounts of the gas will cause a person's head to hurt.
VOA: special.2010.02.02
T.Rex had a big head, long legs and small arms.
VOA: special.2009.10.13
They differ from so-called 'locked-in' patients whose brain function is intact but are paralysed and communicate usually through eye or smallhead movements.